Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for manufacturing battery electrode plate

A manufacturing method and electrode plate technology, which can be used in electrode manufacturing, battery electrodes, secondary batteries, etc., can solve problems such as inability to obtain pressure, and achieve the effects of reducing material loss, improving production efficiency, and reducing the number of processes

Inactive Publication Date: 2011-05-04
PANASONIC CORP
View PDF10 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a lithium-ion secondary battery in which the thickness of the electrode plate precursor including the coating part of the active material is 300 μm at most, when a gasket is used, the desired pressing force cannot be obtained.
Therefore, most recently do not use liners

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for manufacturing battery electrode plate
  • Method for manufacturing battery electrode plate
  • Method for manufacturing battery electrode plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4 and comparative example 1～3

[0090] figure 1 It is a perspective view showing a schematic configuration of a rolling apparatus used in Examples 1 to 4 of the present invention.

[0091] Such as figure 1 As shown, the rolling apparatus has a pressure roll 8 composed of a pair of rolls 8A and 8B having a relatively large diameter (diameter: 500 mm, width: 600 mm). The rollers 8A and 8B of the pressure roller 8 are arranged vertically and parallel to each other with a predetermined gap. The current collector 5 that is provided with the active material layer (coated part of the active material) 4 on the surface, that is, the first electrode plate precursor 1, is transported in the longitudinal direction (as shown by the arrow A in the figure) and made to The active material layer 4 is compressed by passing between the rollers 8A and 8B, and the first electrode plate precursor 1 is rolled to a predetermined thickness.

[0092] Here, the pressing roller 8 is: both rollers 8A and 8B are composed of Figure...

Embodiment 5～8

[0108] Using the same materials as in Examples 1 to 4, the width of the first non-coating portion 7 was prepared to be 2 mm (Example 5), 4 mm (Example 6), 6 mm (Example 7), and 8 mm (Example 8). ) any one of the four first electrode plate precursors 1 . use figure 1 The first electrode plate precursor 1 with a total thickness of 270 μm is rolled by rolling rolls 8 so that the total thickness becomes 210 μm. The rolling ratio of this rolling treatment alone was 23.5%. After rolling, the first electrode plate precursor 1 wound up by a reel not shown is rewound from the reel with its front and back reversed, and is reused at the same time. figure 1 rolling device, rolling until the total thickness reaches 190 μm. The rolling ratio of this rolling treatment alone was 10.3%. A positive electrode plate was produced in the same manner as in Examples 1 to 4 except for this. At this time, the total rolling ratio was 31.4%.

[0109] Here, the occurrence rate of wrinkle defects w...

Embodiment 9～12

[0113] Such as Figure 4 As shown, in Examples 9-12, used in figure 1 The rolling apparatus obtained by additionally disposing the rear stage pressure roller 9 composed of a pair of rollers 9A and 9B at the rear stage of the pressure roller 8 and the front stage of the rear tension roller 3 in the apparatus. Here, each roller 9A, 9B of the rear-stage pressure roller 9 is a convex roller (refer to Figure 5 ).

[0114] Using the same materials as in Examples 1 to 4, prepare a total thickness of 270 μm and a width of the first non-coating portion 7 of 2 mm (Example 9), 4 mm (Example 10), 6 mm (Example 11), and 8 mm (Example 12) any one of the four first electrode plate precursors 1 . These first electrode plate precursors 1 were rolled with the above-mentioned rolling device until the total thickness reached 210 μm (rolling ratio 23.5%) with the pressure roll 8, and then rolled to the total thickness with the subsequent pressure roll 9 It reaches 190 μm (rolling ratio 10.3%...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
widthaaaaaaaaaa
Login to View More

Abstract

Provided is a method for manufacturing a battery electrode plate including: a step [a] which applies an electrode active material at least to one of the surfaces of a belt-shaped collector so as to obtain a first electrode precursor (1) having an active material layer; a step [b] which rolls the electrode plate precursor so as to make the active material layer have a predetermined thickness; and a step [c] which cuts the rolled electrode plate precursor into a desired width to obtain a plurality of belt-shaped electrode plates. In the step [a], a non-material-applied portion to which the active material is not applied is formed at both ends in the width direction of the electrode plate precursor. A step [d] for cutting off the non-active-material-applied portion is executed simultaneously with the step [c]. This reduces the quality defects generated in the step of rolling the electrode precursor, which in turn improves the production efficiency with a reduced material loss.

Description

technical field [0001] The present invention relates to a method of manufacturing a battery electrode plate, and more specifically, to an improvement in a method of manufacturing a battery electrode plate by coating an active material on a strip-shaped current collector and cutting it into a desired size. Background technique [0002] In recent years, the mobility and cordlessness of electronic equipment such as AV equipment, personal computers, and portable communication equipment are rapidly progressing. Conventionally, aqueous solution-based batteries such as nickel-cadmium batteries and nickel-metal hydride batteries have been mainly used as power sources for driving these electronic devices. However, in recent years, non-aqueous electrolyte batteries represented by lithium-ion secondary batteries capable of rapid charging and having high volumetric energy density and high gravimetric energy density have become mainstream for batteries used for these power sources. On t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/139H01M10/0525
CPCH01M4/0404H01M4/0409H01M10/0525Y02E60/10
Inventor 清水恭重大岛健一堀秀雄
Owner PANASONIC CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com